[shine]

If you extend the hull running surface, you will change the dynamic stability and how the boat planes. Not somethign you want to do unless you are able to calculate and predict the what your new hull will do. Raising the bracket slightly allows the water to break clean off the original planning surface (hull), but its there almost in an instant for displacement when you come off plane or a swell overtakes you.

AS far as making it yourself and tying it into the stringers. I gave this thought myself for my 23CC and I have seen it done before. Its a ton of extra work, but it is possible. I will go with a bracket for my boat, I would rather spend the time and energy on other parts of the boat.